Nold buchholz



(No Model.)

J. A. A. BUGHHOLZ.

ROLLER MILL.

Patented June 9, 1891.

Inven/ar:

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ish Letters Patent No. 2,054, dated STATES JOHN A. ARNOLD BUCHIIOLZ,

OF T\YICKENIIAM, ENGLAND.

ROLLER-MILL.

SPECIFICATION forming part of Letters Patent No. 453,755, dated June 9, 1891.

Application filed February 7,1885. $erial No. 155,163.

17, 18 3,110.4,439; in France October 31,

To all whom it may concern:

Be it known that 1, JOHN AUGUSTE AR- NOLD BUCHHOLZ, engineer, of Twickenham, in the county of Middlesex, England, have invented a new and useful Improvement in Roller-Mills, (for which I have obtained Brit- May 1, 1882, and No. 4,439, dated September 17, 1883; French Brevet dlnvention, No. 151,850, dated October 31, 188:2,and German Imperial Patent No. 29,732, dated May 21, 1884,) of which the following is a specification, reference being had to the accompanying drawings.

My invention consists in novel drivinggear, hereinafter described and claimed, for driving the crushing-rollers of a roller-mill, whereby a single driving-belt is made to run on pulleys on both ends of the shafts of both of said rollers, and is weighted to produce equal pressure on the pulleys at each end of each roller, and thereby to render the motion of the rollers certain, smooth, and regular.

In the accompanying drawings I have shown my invention applied to a disk or shortroller mill. It is, however, equally applicable to mills having rollers of the ordinarylength.

Figure 1 represents a side elevation of the mill; Fig. 2, a vertical section at rightangles to Fig. l. on the line 1 2 thereof, and Fig. 3 a front view. Fig. 3* exhibits a plan of the bed-plate of the mill and a diagram of all the driving-pulleys, the pulleys on the rollershafts being shown in full outline and the other pulleys in dotted outline.

Similar letters of reference indicate corre sponding parts in the several figures.

A A designate the rollers. The axle of the lower roller A turns in fixed bearings in the stationary framing B of the mill, and the axle of the upper roller is carried by a pair of arms J, pivoted at their rear end to the framing B. These arms 0 extend beyond the axle and toward the front of the mill, and are formed at their rear extremities with bosses through which pass screw-bolts D, which hang upon a crank-shaft F, which is mounted in bearings in the framing B. The said arms C are supported upon nuts on the (N0 model.) Patented in England May 1,1882,No. 2,054, and September 1882, No. 151,850, and in Germany May 24, 1884,1111. 29,732-

said bolts, which serve to adjust the said arms and the upper roller A, and so adjust the distance between the rollers. As this adjustment is not part of the present invention, it needs no further description, but is only so far described to illustrate the provision for Weighting the upper roller hereinafter described.

G is the driving-shaft, which is to be supported in fixed bearings, and on which are placed two driving-pulleys g g above similar pulleys a a on the opposite ends of the axle of the roller A, for the purpose of driving the rollers at both ends with one belt. This belt G is passed from the driving-pulley g on the lefthand side of the machine under the pulley a of the axle of the roller A. The belt then )asses over the corres )ondiin )ullev a of the axle of the upper roller A, and it is next led out to and under a skewed guide-pulley 71., which guides it up to the driving-pulley g. The belt then passes down to the pulley a on the right-hand side of the rollerA, thence to a corresponding pulley a on the upper-roller axle, and by meansof asecond skewed guidepulley h the belt is conducted back to its starting-point. The elfect of this arrangement is to produceaperfect balance of all the strains of the driving-gear throughout every part of the machine. The said arrangement, moreover, serves, when the band is weighted, to put the requisite downward pressure upon the upper roller. This weighting of the driving-band is eifected in the following manner, the details of the arrangement being given in order to provide a complete description of the mill in its most approved form.

The skewed guide-pulleys h it (see Fig. 1, and also the plan. vie\v,Fig. 3*) are carried by cross-heads 11 H, mounted between guiderods H H pendent from thebase-plate of the mill. These cross-heads are connected rigidly, and they are free to slide on the guiderods, they being held up by the band G. Pendent from the coupled cross-heads isa weighted rod 11 which is intended to hold the driving-band G at the desired tension.

I do not here claim the means herein rep resented for adjusting the rollers, such means forming part of the subject-matter of my application for United Stated patent, Serial No. 155372, filed February 10, 1885.

Having explained the nature of my invention, I Wish it to be understood thatI elain1 In a roller-mill, the combination, with the driving-shaft provided with two band-pulleys, suitable guide-pulleys, and two rollers having driving-pulleys at each end, of a single driving-band common to the pulleys on both ends [0 of both rolls, substantially as and for the purpose herein described.

J'. A. ARNOLD BUOHHOLZ. Vitnesses:

T. PARR,

Notary Public, Bristol. WILLIAM M. KEMP,

41 Broad Street, Bristol, Account/(mt. 

